Comment Notes on cellphone frequencies and pagers....... (Score 0) 427
First off, cellphones are in the 800 Mhz. band, "A" and "B" segments, I am not going to cover those portions here.
Pagers operate at several bands, most notably here are the VHF band/s at 150 Mhz., UHF band/s at 450 Mhz., and the 900 Mhz. band, like 929.7375 and so on.
I have never seen ANY pager on the 220 band in my state, so I can't claim they do not exist, but since the 220 band is carved up into business land mobile use, amateur radio and other government "services", suffice it to say that cellphones are not bothered by pagers or any device/s in the 220 band segment either, so designing a "jammer" for those frequencies would be a waste of money and time.
Now your cell jammer would have to be designed to be fully autonomous in nature, tri-banded and use antennas that are designed for tri-band phones so the effective radiated power is not wasted heating the coax, but is actually being radiated by the antenna.
Simple procedure if you are desirous of interrupting AMPS phones, but GSM, PCS and all TDMA, CDMA modulation types will take high cost equipment to "cheat" the built-in logic of the hardware, this is not a simple diode snip of a scanner here, but full-blown engineering challenge/s to the not so faint-of-heart.
My IFR 1200 super S does not have all I would need to even begin the process, but I can scan the control channels of AMPS towers and get the block assignments of those towers so I can punch in the frequencies, attach my 4 stage PA to the output and have at it, but why, for what gain do you achieve here?
Does anybody really think that the temporary blockage of a call is going to do anything here?
If you do succeed, they will just try again, and probably at a time even more dangerous to those around them!
People are too self important to think about their neighbors, they assume the world revolves around them alone, hence "your" courtesy is "supposed" to be for them, and them alone.
Simple solution; slow down in front of the car phone user, and if slowing to 40 doesn't get their attention, try some other form of rolling barricade, it works for the police.
Have your buddies go with and look for those cellphone users and then motion for everybody in the group to box in and slow down, that driver until they hang up the phone and pay attention!
Sure, they'll probably call the cops, but YOUR plea will be for the safety of ALL the vehicles on the road, you were simply attempting to prove to one driver that they are too distracted and you were simply trying to make them pay attention to the road(which you too are on).
If that doesn't work, file a complaint with the officer, state she/he was driving erraticly and you wanted to "assist" with keeping the roadways safe by gaining his/her attention, maybe the cop might thank you for being a "concerned" motorist and even win you a few "brownie points" as well.
In conclusion, jammers are not worth the money, time and effort for simply stopping a call, it's a burden on your resources, not the caller's.
You could also buy an ESN reader and clone the ESN and set them up to autodial all over the county, but this is again, an AMPS thing, not TDMA, CDMA or GSM, PCS "solution".
*CNN today reported that there is a new fad hitting the highways: CELLPHONE WAR DRIVING is the rage in California as drivers are trying to jam stupid cellphone users distracted by their use of their phone while enroute to work, school or soccer practice. Motorists are modifying their phones so they can transmit a signal that will jam the other motorist's cellphone during a call.
Oh well, I can dream of the fun, can't I?
Pagers operate at several bands, most notably here are the VHF band/s at 150 Mhz., UHF band/s at 450 Mhz., and the 900 Mhz. band, like 929.7375 and so on.
I have never seen ANY pager on the 220 band in my state, so I can't claim they do not exist, but since the 220 band is carved up into business land mobile use, amateur radio and other government "services", suffice it to say that cellphones are not bothered by pagers or any device/s in the 220 band segment either, so designing a "jammer" for those frequencies would be a waste of money and time.
Now your cell jammer would have to be designed to be fully autonomous in nature, tri-banded and use antennas that are designed for tri-band phones so the effective radiated power is not wasted heating the coax, but is actually being radiated by the antenna.
Simple procedure if you are desirous of interrupting AMPS phones, but GSM, PCS and all TDMA, CDMA modulation types will take high cost equipment to "cheat" the built-in logic of the hardware, this is not a simple diode snip of a scanner here, but full-blown engineering challenge/s to the not so faint-of-heart.
My IFR 1200 super S does not have all I would need to even begin the process, but I can scan the control channels of AMPS towers and get the block assignments of those towers so I can punch in the frequencies, attach my 4 stage PA to the output and have at it, but why, for what gain do you achieve here?
Does anybody really think that the temporary blockage of a call is going to do anything here?
If you do succeed, they will just try again, and probably at a time even more dangerous to those around them!
People are too self important to think about their neighbors, they assume the world revolves around them alone, hence "your" courtesy is "supposed" to be for them, and them alone.
Simple solution; slow down in front of the car phone user, and if slowing to 40 doesn't get their attention, try some other form of rolling barricade, it works for the police.
Have your buddies go with and look for those cellphone users and then motion for everybody in the group to box in and slow down, that driver until they hang up the phone and pay attention!
Sure, they'll probably call the cops, but YOUR plea will be for the safety of ALL the vehicles on the road, you were simply attempting to prove to one driver that they are too distracted and you were simply trying to make them pay attention to the road(which you too are on).
If that doesn't work, file a complaint with the officer, state she/he was driving erraticly and you wanted to "assist" with keeping the roadways safe by gaining his/her attention, maybe the cop might thank you for being a "concerned" motorist and even win you a few "brownie points" as well.
In conclusion, jammers are not worth the money, time and effort for simply stopping a call, it's a burden on your resources, not the caller's.
You could also buy an ESN reader and clone the ESN and set them up to autodial all over the county, but this is again, an AMPS thing, not TDMA, CDMA or GSM, PCS "solution".
*CNN today reported that there is a new fad hitting the highways: CELLPHONE WAR DRIVING is the rage in California as drivers are trying to jam stupid cellphone users distracted by their use of their phone while enroute to work, school or soccer practice. Motorists are modifying their phones so they can transmit a signal that will jam the other motorist's cellphone during a call.
Oh well, I can dream of the fun, can't I?
